Anti-explosion valve, battery top cover assembly and battery

Abstract

The utility model belongs to the technical field of batteries, and discloses an anti-explosion valve, a battery top cover assembly and a battery. The anti-explosion valve is applied to the top cover piece, an exhaust hole is formed in the top cover piece, the anti-explosion valve is arranged on the exhaust hole in a sealed mode, the anti-explosion valve comprises an anti-explosion piece and an anti-explosion valve protection patch, and the anti-explosion piece is installed on the top cover piece and arranged in the exhaust hole in a sealed mode; the explosion-proof valve protection patch is installed on the top cover piece and covers the exhaust hole. One of the explosion-proof valve protection patch and the top cover piece is provided with a positioning boss, the other one of the explosion-proof valve protection patch and the top cover piece is provided with a positioning hole, and the positioning boss is connected with the positioning hole in a clamped mode. Through the arrangement, the positioning hole and the positioning boss are used as a group of mutually matched positioning components, and the positioning hole and the positioning boss are used for position alignment, so that the effect of pre-positioning the anti-explosion valve protection patch before pasting is achieved, the positioning accuracy is improved, the problem of skew pasting of the anti-explosion valve protection patch is avoided, and the pasting quality of the anti-explosion valve protection patch is improved. And therefore, the production and manufacturing cost is reduced, and the chip mounting efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to an explosion-proof valve, a battery top cover assembly and a battery. Background Art

[0002] Existing battery top covers are typically equipped with explosion-proof holes to ensure battery safety and reliability. An explosion-proof disc is welded inside the hole to protect the airtightness of the top cover and battery cells. An explosion-proof valve protection patch is affixed to the hole's opening. This prevents residual electrolyte on the top cover from flowing onto the top surface of the disc during electrolyte injection and prevents foreign objects from puncturing the disc.

[0003] In common battery top cover assemblies, the explosion-proof valve protection patch is directly attached to the explosion-proof hole mouth, but since there is no positioning structure, it is impossible to accurately position the explosion-proof valve protection patch when pasting it, and it is easy for the explosion-proof valve protection patch to be pasted crookedly. At this time, the explosion-proof valve protection patch needs to be removed and re-pasted, resulting in low production efficiency of the battery top cover assembly, high scrap rate of the explosion-proof valve protection patch, and increased production costs. Utility Model Content

[0004] One purpose of the present invention is to provide an explosion-proof valve to solve the technical problem in the prior art that the explosion-proof valve protection patch has poor positioning accuracy during the pasting process, resulting in high production costs.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] The explosion-proof valve is applied to the top cover sheet. The top cover sheet is provided with an exhaust hole. The explosion-proof valve is sealed in the exhaust hole. The explosion-proof valve includes:

[0007] An explosion-proof disk, the explosion-proof disk is mounted on the top cover and sealed in the exhaust hole;

[0008] An explosion-proof valve protection patch, which is installed on the top cover sheet and covers the exhaust hole;

[0009] One of the explosion-proof valve protection patch and the top cover sheet is provided with a positioning boss, and the other one is provided with a positioning hole, and the positioning boss is snap-connected with the positioning hole.

[0010] Preferably, the explosion-proof valve protection patch is provided with the positioning hole, and the top cover is provided with the positioning boss.

[0011] Preferably, at least two positioning holes are circumferentially spaced apart on the explosion-proof valve protection patch, and at least two positioning bosses are protruding around the exhaust hole on the top cover sheet, and the positioning bosses are arranged in a one-to-one correspondence with the positioning holes.

[0012] Preferably, along a direction parallel to the plane of the explosion-proof valve protection patch, the outer peripheral surface of the explosion-proof valve protection patch is recessed from the outside to the inside to form the positioning hole.

[0013] Preferably, there is a clearance fit between the positioning boss and the positioning hole, an exhaust channel is provided between the explosion-proof valve protection patch and the top cover sheet, and a accommodating chamber is formed between the explosion-proof valve protection patch and the explosion-proof sheet, and the interior and exterior of the accommodating chamber can be communicated through the exhaust channel and the gap between the positioning boss and the positioning hole.

[0014] Preferably, the explosion-proof valve protection patch includes a protection patch body and a back adhesive layer, wherein:

[0015] The protective patch body is mounted on the top cover and covers the exhaust hole, and the accommodating chamber is formed between the protective patch body and the explosion-proof plate;

[0016] The adhesive layer is sandwiched between the protective patch body and the top cover sheet, so that the protective patch body and the top cover sheet are spaced apart and the exhaust channel is formed therebetween.

[0017] Preferably, the outer periphery of the protective patch body is adhered with two opposing and spaced-apart back adhesive layers, and along the plane direction parallel to the explosion-proof valve protective patch, the back adhesive layer includes a first adhesive layer and a second adhesive layer arranged in sequence from the inside to the outside, the first adhesive layer is sandwiched between the protective patch body and the top cover sheet, the second adhesive layer is protruding from the outer edge of the explosion-proof valve protective patch, and the positioning holes are formed at intervals at the ends of adjacent second adhesive layers.

[0018] Preferably, the gap between the positioning boss and the positioning hole is not less than 0.05 mm and not more than 0.2 mm.

[0019] Another object of the present invention is to provide a battery top cover assembly, which can improve the production efficiency and finished product quality of the battery top cover assembly.

[0020] To achieve this purpose, the present invention adopts the following technical solutions:

[0021] The battery top cover assembly includes a top cover sheet and the above-mentioned explosion-proof valve, wherein the top cover sheet is provided with an exhaust hole, the explosion-proof plate of the explosion-proof valve is mounted on the top cover sheet and sealed in the exhaust hole, the explosion-proof valve protection patch of the explosion-proof valve is mounted on the top cover sheet and covers the exhaust hole, one of the explosion-proof valve protection patch and the top cover sheet is provided with a positioning boss, and the other of the two is provided with a positioning hole, and the positioning boss is snap-fitted to the positioning hole.

[0022] Another object of the present invention is to provide a battery that can ensure the production efficiency and quality of the battery while reducing the production cost of the battery.

[0023] To achieve this purpose, the present invention adopts the following technical solutions:

[0024] A battery comprises a battery shell, a battery cell and the above-mentioned battery top cover assembly, wherein the battery shell has an opening, the battery cell is accommodated in the battery shell, and the battery top cover assembly is sealed at the opening of the battery shell.

[0025] Beneficial effects of the utility model:

[0026] The utility model provides an explosion-proof valve. In the explosion-proof valve, since the positioning holes and the positioning bosses are set as a snap-fit ​​connection mode, before the explosion-proof valve protection patch is pasted, the positioning holes and the positioning bosses can be used as a group of mutually cooperating positioning components, and the positioning holes and the positioning bosses are used to accurately locate the position, thereby achieving the effect of pre-positioning the explosion-proof valve protection patch before pasting, thereby improving the positioning accuracy, effectively avoiding the problem of skew pasting of the explosion-proof valve protection patch, thereby reducing production and manufacturing costs, and helping to improve patch efficiency.

[0027] The present invention also provides a battery top cover assembly, including the above-mentioned explosion-proof valve. Since the positioning hole and the positioning boss in the above-mentioned explosion-proof valve are arranged in a snap-fit ​​connection mode, the explosion-proof valve protection patch can be pre-positioned before being pasted, thereby improving the positioning accuracy, effectively avoiding the problem of crooked pasting of the explosion-proof valve protection patch, reducing production costs, helping to improve patch efficiency, and thus improving the production efficiency of the battery top cover assembly and the quality of the finished product.

[0028] This embodiment also provides a battery comprising a battery housing, a battery cell, and the battery top cover assembly described in the above embodiment. The battery housing has an opening, and the battery cell is housed within the battery housing. In the battery top cover assembly, a top cover sheet is welded and sealed to the opening of the battery housing. By installing the battery top cover assembly within the battery, not only is battery production efficiency and quality effectively guaranteed, but it also helps reduce the scrap rate of the explosion-proof valve protective patch, thereby significantly reducing battery production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the battery top cover assembly provided by the utility model;

[0030] Figure 2 It is a top view of the battery top cover assembly provided by the utility model;

[0031] Figure 3 yes Figure 2Cross-sectional view along AA;

[0032] Figure 4 yes Figure 3 A partial enlarged view of point B in the middle;

[0033] Figure 5 This is a schematic diagram of the structure of the battery top cover assembly provided by the present invention, wherein the top cover sheet and the explosion-proof valve protection patch are partially exploded;

[0034] Figure 6 This is a schematic diagram of the structure of the explosion-proof valve protection patch provided by the utility model;

[0035] Figure 7 yes Figure 2 A partial enlarged view of point C in the middle.

[0036] In the picture:

[0037] 100, top cover; 110, exhaust hole; 120, exhaust channel; 130, accommodating chamber;

[0038] 1. Explosion-proof valve; 101. Positioning hole; 102. Positioning boss; 11. Explosion-proof disk; 12. Explosion-proof valve protection patch; 121. Protection patch body; 122. Adhesive layer; 1221. First adhesive layer; 1222. Second adhesive layer. DETAILED DESCRIPTION

[0039] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0040] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0041] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0042] In the description of this embodiment, terms such as "upper," "lower," "right," and "left" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0043] The technical solution provided by the present utility model is described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] Combine Figures 1 to 5 As shown, this embodiment provides an explosion-proof valve 1, which is arranged on a top cover sheet 100. A vent hole 110 is opened through the middle position of the top cover sheet 100, and the explosion-proof valve 1 is sealed on the vent hole 110. The explosion-proof valve 1 includes an explosion-proof disc 11 and an explosion-proof valve protection patch 12, wherein the explosion-proof disc 11 is installed on the top cover sheet 100 and is sealed in the vent hole 110; the explosion-proof valve protection patch 12 is also installed on the top cover sheet 100 and covers the vent hole 110 to protect the explosion-proof disc 11. The vent hole 110 is preferably a waist-shaped hole, and the explosion-proof disc 11 and the explosion-proof valve protection patch 12 are both elliptical structures to match the appearance characteristics of the vent hole 110 and ensure connection stability.

[0045] One implementation method of this embodiment is to combine Figure 1 、 Figure 5As shown, a positioning hole 101 is provided on the explosion-proof valve protection patch 12, and a positioning boss 102 is provided on the top cover sheet 100 at a position close to the mouth of the exhaust hole 110. The positioning hole 101 is snapped into the positioning boss 102 to complete the positioning and matching connection between the explosion-proof valve protection patch 12 and the top cover sheet 100. In the above arrangement, since the positioning hole 101 and the positioning boss 102 are set as a snap-fit ​​connection method, before pasting the explosion-proof valve protection patch 12, the positioning hole 101 and the positioning boss 102 can be used as a set of mutually cooperating positioning components, and the positioning hole 101 and the positioning boss 102 are used to accurately locate the position, thereby achieving the effect of pre-positioning the explosion-proof valve protection patch 12 before pasting, thereby improving the positioning accuracy, effectively avoiding the problem of crooked pasting of the explosion-proof valve protection patch 12, thereby reducing the production cost and helping to improve the patch efficiency.

[0046] Furthermore, in this embodiment, as shown in the reference figure, a positioning hole 101 is provided at each end of the explosion-proof valve protection patch 12 along the long axis direction of the explosion-proof valve protection patch 12. Correspondingly, two positioning bosses 102 are provided on the top cover sheet 100 protruding around the exhaust hole 110. The two positioning bosses 102 are correspondingly provided in the two positioning holes 101. On the basis of effectively controlling the production and manufacturing costs of the explosion-proof valve protection patch 12 and the top cover sheet 100, the positioning accuracy of the explosion-proof valve protection patch 12 on the top cover sheet 100 is further enhanced, thereby greatly reducing the probability of the explosion-proof valve protection patch 12 being skewed after being affixed to the top cover sheet 100. In other parallel embodiments, the number of positioning bosses 102 in the positioning hole 101 can also be provided with more than two to meet the higher positioning, installation and stability requirements of the explosion-proof valve protection patch 12 in actual working conditions. The present invention is not limited to this.

[0047] It should be noted that the horizontal cross-sectional shapes of the positioning hole 101 and the positioning boss 102 are the same, but this embodiment does not limit the horizontal cross-sectional shapes of the positioning hole 101 and the positioning boss 102. Taking the positioning boss 102 as an example, the horizontal cross-sectional shape of the positioning boss 102 can be an arc, a circle, or a square. As long as the positioning boss 102 and the positioning hole 101 are positioned correspondingly and the size and shape are adapted, they are all within the scope of protection of the present utility model. For example, in this embodiment, the cross-sectional shapes of the positioning boss 102 and the positioning hole 101 are both arc-shaped.

[0048] Of course, it is understandable that in other implementations of this embodiment, the above-mentioned positioning boss 102 can also be provided on the explosion-proof valve protection patch 12, and the above-mentioned positioning hole 101 can be opened on the top cover piece 100 near the mouth of the exhaust hole 110. This can also meet the positioning effect of the explosion-proof valve protection patch 12, so those skilled in the art can choose from the above multiple implementations according to actual working conditions.

[0049] In this embodiment, reference Figure 4 As shown, there is a clearance fit between the positioning boss 102 and the positioning hole 101. An exhaust channel 120 is provided between the explosion-proof valve protection patch 12 and the top cover 100. A housing chamber 130 is formed between the explosion-proof valve protection patch 12 and the explosion-proof disc 11. The interior and exterior of the housing chamber 130 are connected through the exhaust channel 120, the gap between the positioning boss 102, and the positioning hole 101. During use, when the air pressure within the housing chamber 130 increases due to a rise in temperature, the gas within it is discharged through the exhaust channel 120 and the gap between the positioning boss 102 and the positioning hole 101, thereby preventing the pressure on the side of the explosion-proof disc 11 located within the housing chamber 130 from falling below a preset range. This arrangement ensures that when the pressure on the side of the explosion-proof disc 11 away from the housing chamber 130 is high, the explosion-proof disc 11 can function normally, i.e., explode at the explosion threshold, thereby steadily releasing the pressure within the battery and preventing safety accidents such as battery explosions.

[0050] Specifically, one implementation method of this embodiment is to refer to Figure 6 As shown, the explosion-proof valve protection patch 12 includes a protection patch body 121 and a back adhesive layer 122, wherein the protection patch body 121 is installed on the top cover sheet 100 and covers the exhaust hole 110, and the above-mentioned accommodating chamber 130 is formed between the protection patch body 121 and the explosion-proof patch 11; the back adhesive layer 122 is sandwiched between the protection patch body 121 and the top cover sheet 100, so that the protection patch body 121 is adhered to the top cover sheet 100 through the back adhesive layer 122, so that the protection patch body 121 can be spaced apart from the top cover sheet 100 to form an exhaust channel 120 between the two.

[0051] For example, in this embodiment, the gap between the positioning boss 102 and the positioning hole 101 is not less than 0.05 mm and not more than 0.2 mm. Figure 7 As shown, there are two gaps a between the positioning boss 102 and the positioning hole 101, one of which is the distance between the side of the positioning boss 102 and the side wall of the positioning hole 101, and the other is the distance between the bottom of the positioning boss 102 and the bottom wall of the positioning hole 101. Both distances are gaps a. The gap a can be 0.05mm, 0.10mm, 0.15mm or 0.2mm. By setting the gap between the positioning boss 102 and the positioning hole 101 within the above range, it can not only ensure that the gas in the accommodating chamber 130 can be discharged from the above gap in a stable and orderly manner, but also ensure that there is sufficient covering area between the explosion-proof valve protection patch 12 and the top cover sheet 100, preventing the explosion-proof valve protection patch 12 from failing to connect due to insufficient covering area.

[0052] Optionally, in this embodiment, reference Figure 4 As shown, the height h of the positioning boss 102 ranges from no less than 0.2 mm to no greater than 1 mm. For example, the height h of the positioning boss 102 is 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, or 1 mm. By setting the height of the positioning boss 102 within the above range, while keeping the height of the positioning boss 102 within a reasonable height range, the explosion-proof valve protection patch 12 can be effectively limited, preventing the explosion-proof valve protection patch 12 from falling off the positioning boss 102.

[0053] Positioning holes 101 are formed on the outer circumference of explosion-proof valve protection patch 12, which is recessed from the outside to the inside, parallel to the plane of the explosion-proof valve protection patch 12. This arrangement simplifies the manufacturing process compared to creating positioning holes 101 with sidewalls on all sides of the plane of explosion-proof valve protection patch 12, reducing processing complexity and thus improving production efficiency.

[0054] Specifically, one implementation method of this embodiment is: Figure 6 As shown, the outer periphery of the protective patch body 121 is bonded with two opposing and spaced-apart adhesive layers 122. Along a plane parallel to the explosion-proof valve protective patch 12, the adhesive layer 122 comprises, from the inside out, a first adhesive layer 1221 and a second adhesive layer 1222. The first adhesive layer 1221 and the second adhesive layer 1222 are both annular structures, with the first adhesive layer 1221 sandwiched between the protective patch body 121 and the top cover sheet 100. The second adhesive layer 1222 protrudes from the outer edge of the protective patch body 121, and the aforementioned positioning holes 101 are formed at intervals between the ends of adjacent second adhesive layers 1222. The positioning hole 101 formed in the above manner does not require a hole to be opened on the protective patch body 121. It only requires a backing adhesive layer 122 of a specific shape to be provided on the protective patch body 121. This can enable both pasting on the top cover sheet 100 and forming the positioning hole 101, thereby simplifying the manufacturing process of the positioning hole 101 and effectively improving the patch efficiency of the explosion-proof valve protective patch 12.

[0055] This embodiment further provides a battery top cover assembly, which includes a top cover sheet 100 and the explosion-proof valve 1 of the above embodiment. A vent 110 is provided on the top cover sheet 100, and the explosion-proof disc 11 of the explosion-proof valve 1 is mounted on the top cover sheet 100 and sealed within the vent 110. An explosion-proof valve protection patch 12 of the explosion-proof valve 1 is mounted on the top cover sheet 100 and covers the vent 110. A positioning hole 101 is provided on the explosion-proof valve protection patch 12, and a positioning boss 102 is provided on the top cover sheet 100. The positioning boss 102 is engaged with the positioning hole 101 to complete the positioning and matching connection between the explosion-proof valve protection patch 12 and the top cover sheet 100. Since the positioning hole 101 and the positioning boss 102 are set to a snap-on connection mode, the explosion-proof valve protection patch 12 can be pre-positioned before being pasted, thereby improving the positioning accuracy, effectively avoiding the problem of crooked pasting of the explosion-proof valve protection patch 12, reducing production costs, and helping to improve patch efficiency, thereby improving the production efficiency of the battery top cover assembly and the quality of the finished product.

[0056] It should be noted that when in the battery top cover assembly, a convex rib with an annular structure is provided on the top cover sheet 100 around the mouth of the exhaust hole 110, and the explosion-proof valve protection patch 12 needs to be attached to the convex rib, by further protruding upwardly on the top of the convex rib a positioning boss 102 is provided, so that the purpose of precise positioning and installation between the top cover sheet 100 and the explosion-proof valve protection patch 12 can still be achieved. Therefore, the present invention does not limit the structure of the top cover sheet 100.

[0057] This embodiment also provides a battery, comprising a battery housing, a battery cell, and the battery top cover assembly of the above embodiment, wherein the battery housing has an opening, the battery cell is accommodated in the battery housing, and in the battery top cover assembly, a top cover sheet 100 is welded and sealed to the opening of the battery housing. In conjunction with the above detailed description of the embodiment of the utility model, it can be seen that, compared with the prior art, the battery in this embodiment avoids the problem of poor positioning accuracy between the explosion-proof valve protection patch 12 and the top cover sheet 100, thereby reducing the number of times the explosion-proof valve protection patch 12 needs to be removed and re-attached, which not only effectively ensures the production efficiency and quality of the battery, but also helps to reduce the scrap rate of the explosion-proof valve protection patch 12, thereby greatly reducing the production cost of the battery.

[0058] Throughout this specification, references to terms such as "some embodiments" and "other embodiments" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0059] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. An explosion-proof valve, applied to a top cover sheet (100), wherein the top cover sheet (100) is provided with an exhaust hole (110), wherein the explosion-proof valve (1) is sealed and arranged in the exhaust hole (110), and wherein the explosion-proof valve (1) comprises: An explosion-proof plate (11), the explosion-proof plate (11) being mounted on the top cover plate (100) and being sealed in the exhaust hole (110); an explosion-proof valve protection patch (12), the explosion-proof valve protection patch (12) being mounted on the top cover sheet (100) and covering the exhaust hole (110); It is characterized in that one of the explosion-proof valve protection patch (12) and the top cover sheet (100) is provided with a positioning boss (102), and the other one is provided with a positioning hole (101), and the positioning boss (102) and the positioning hole (101) are snap-connected.

2. The explosion-proof valve according to claim 1, characterized in that: The explosion-proof valve protection patch (12) is provided with the positioning hole (101), and the top cover sheet (100) is provided with the positioning boss (102).

3. The explosion-proof valve according to claim 2, characterized in that: At least two positioning holes (101) are provided on the explosion-proof valve protection patch (12) at intervals along the circumferential direction, and at least two positioning bosses (102) are provided on the top cover sheet (100) protruding around the exhaust hole (110), and the positioning bosses (102) are provided in a one-to-one correspondence with the positioning holes (101).

4. The explosion-proof valve according to claim 2, characterized in that: Along a plane direction parallel to the explosion-proof valve protection patch (12), the outer peripheral surface of the explosion-proof valve protection patch (12) is recessed from the outside to the inside to form the positioning hole (101).

5. The explosion-proof valve according to claim 4, characterized in that: There is a clearance fit between the positioning boss (102) and the positioning hole (101); an exhaust channel (120) is provided between the explosion-proof valve protection patch (12) and the top cover sheet (100); and a receiving chamber (130) is formed between the explosion-proof valve protection patch (12) and the explosion-proof sheet (11); the interior and exterior of the receiving chamber (130) can be communicated through the exhaust channel (120) and the gap between the positioning boss (102) and the positioning hole (101).

6. The explosion-proof valve according to claim 5, characterized in that: The explosion-proof valve protection patch (12) comprises a protection patch body (121) and a back adhesive layer (122), wherein: The protective patch body (121) is mounted on the top cover sheet (100) and covers the exhaust hole (110), and the accommodating chamber (130) is formed between the protective patch body (121) and the explosion-proof sheet (11); The back adhesive layer (122) is sandwiched between the protective patch body (121) and the top cover sheet (100), so that the protective patch body (121) and the top cover sheet (100) are spaced apart and the exhaust channel (120) is formed therebetween.

7. The explosion-proof valve according to claim 6, characterized in that: The outer periphery of the protective patch body (121) is adhered with two opposing and spaced-apart back adhesive layers (122), and along a plane direction parallel to the explosion-proof valve protective patch (12), the back adhesive layer (122) comprises a first adhesive layer (1221) and a second adhesive layer (1222) arranged in sequence from the inside to the outside, the first adhesive layer (1221) is sandwiched between the protective patch body (121) and the top cover sheet (100), the second adhesive layer (1222) is protruding from the outer edge of the explosion-proof valve protective patch (12), and the positioning holes (101) are formed at intervals between the ends of adjacent second adhesive layers (1222).

8. The explosion-proof valve according to claim 5, characterized in that: The gap between the positioning boss (102) and the positioning hole (101) is not less than 0.05 mm and not more than 0.2 mm.

9. Battery top cover assembly, characterized in that, The invention comprises a top cover sheet (100) and an explosion-proof valve (1) according to any one of claims 1 to 8, wherein an exhaust hole (110) is provided on the top cover sheet (100), an explosion-proof sheet (11) of the explosion-proof valve (1) is mounted on the top cover sheet (100) and sealed in the exhaust hole (110), an explosion-proof valve protection patch (12) of the explosion-proof valve (1) is mounted on the top cover sheet (100) and covers the exhaust hole (110), one of the explosion-proof valve protection patch (12) and the top cover sheet (100) is provided with a positioning boss (102), and the other of the two is provided with a positioning hole (101), and the positioning boss (102) and the positioning hole (101) are snap-fitted.

10. A battery, characterized in that The invention comprises a battery shell, a battery cell and the battery top cover assembly according to claim 9, wherein the battery shell has an opening, the battery cell is accommodated in the battery shell, and the battery top cover assembly is sealed at the opening of the battery shell.

Images